Sir,—Not having had the opportunity of examining the drawings of Plate VIII., in the June Number, before the stone was etched, allow me to call attention to some points in which they are defective. In Fig. 1 the oblique foraminal notches are not defined, these are an important character, and are clearly shown upon the fossil; again, Fig. 2 does not give the entire outline of the mandibular ramus, which is well represented upon one of the blocks, inasmuch as the artist has omitted in his drawing the imperfect angular and articular bones preserved upon it, and it is consequently half an inch too short. The enamel of the teeth is finely plicated on the cutting edges, but the teeth are not crenulated, as the drawing of the plications on the enlarged Figure 2b might suggest. Finally, in “Explanation of Plate,” Fig. 2b, for inner read antero-posterior.